I'm new to having chickens. I have a group of 7 chicks that are 7 weeks old. They stay in the coop run all day and bring them in to a brooder at night. (Will have my electric fence put up in a few days, so will stay out at night then in the coop).Yesterday I noticed one all puffed up, lethargic, and not eating. I thought it was because of weather being cold,windy and rainy. But is the same way today. I started them on Corid today. I'm using a syringe to give some of the treated water but not sure she's drinking much. Any suggestions on what I'm doing?. And how soon will I see improvement ?